| Company | Location | Certifications | License # |
|---|---|---|---|
| Aja Martin | Coalville, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03956-OSP |
| Apres Build | Park City, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04255-OSP |
| Home Bound Construction | Kamas, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04325-OSP |
| Johanson Surveying | Salt Lake City, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02891-OSP |
| JR Environmental Design | Coalville, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 02230-OSP |
| Martell Enterprises III Inc. | Wanship, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 02830-OSP |
| Rocky Pace | Coalville, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02825-OSP |
| Stillwaterfork LLC | Mesquite, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 03966-OSP |
| Summit County Health Department | Park City, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 02355-OSP |
| Summit County Health Department | Park City, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 03446-OSP |
| Summit County Health Department | Coalville, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04617-OSP |
| Uinta Mountain | Wanship, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04478-OSP |
| Wild West Excavating LLC | Coalville, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2)Onsite Wastewater Professional (Level 3) | 04512-OSP |
| Zachary Ferry | Henefer, UT | Onsite Wastewater Professional (Level 1)Onsite Wastewater Professional (Level 2) | 04543-OSP |
14 companies in the Utah DEQ certified onsite wastewater system professionals list are based in Summit County as of 2026-07-23. Companies based elsewhere in Utah also commonly serve the county.
Tell us what you need — we'll connect you with state-certified companies serving your area. No obligation.